Passing sentence, Judge Patricia Lees observed that Johnson's reaction to the arrival of the police was to put her foot on the accelerator of her car - despite an officer standing in front of it.
She told Johnson and Edwards: 'Your actions added to the overall lawlessness that threatened to overwhelm the forces of law and order.
'You both come from loving and supportive homes - of neither of you could it be said that your parents have not provided every advantage they could for you.'
Read More | "London riots: Millionaire's daughter Laura Johnson jailed" | ?The BBC